Rotary plow.



No. 700,247.- Patented may 20,1902.

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ROTARY PLOW;

tApplication filed Jan. 7, 1902.)

(No Model.)

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UNITED STATES lPATENT* OFFICE.

JOHN SCOTT, OF EDINBURGH, SCOTLAND.

ROTARY PLOW.

SPECIFICATION forming part of Letters Patent No. 700,247, dated May 20, 1902.

Application filed January '7, 1902. Serial No. 88,794. (No model.)

To a/ZZ whom it may concern.-

Be it known that I, JOHN SCOTT, a citizen of the United Kingdom of Great Britain and Ireland, residing at 37 Willowbrae avenue, Edinburgh, Scotland, have invented a certain new and useful Rotary Plow, (for which application for patent has been made in Great Britain, No. 4,275, dated February 28, 1901,) of which the following is a specification. y

This invention relates to cultivating apparatus of the kind described in the specification of British Letters Patent No. 29,997 of 1897, in which the operating mechanism and cutters are carried by a motor-vehicle and it has for its obj ectto adapt such apparatus for dealing with fallow or grass land by providing them with devices for cutting into and turning over the land after the fashion of a plow. y

The yinvention is illustrated by the accompanying drawings, in which- Figure l is a longitudinal elevation, and

',Fig. 2 an end view, ofy one modification of the rotary plow. Fig.: 3 is a longitudinal elevation of the modified forml ofthe plow.` Fig. 4 is an end view of the plow shown in Figp. vThe plowing tool or deviceillustratedby Figs. l and 2is composed of a cutting-disk A, secured upon a rotating shaft B and having at vone side of the disk Aa helical orscrew blade C, preferably tapering toward its outer orcfree end, so that thehelx is of less diameter at that end,an'd1which blade maybe formed Aupon the shaft asa central core or with an open center, as shown.I The shaft B, in

practice, is mounted so'.v as to extend'transversely of the direction of travel, and the disk A, whose periphery is sharp and enters the ground,serving as a colter or guide,'whi1e the lower edges of the helical blade C also enter 4,

the ground, and by the .rotation of the latter the soil is vturned overvas `the disk andhelical blades travel forward Vwith the vehicle.

' In the modificationillustrated by Figs. 3

and 4 the disk D is formed with anumber of 45 radial or curved and inclined blades E, disposed around the axis of rotation and sloping from the face of each diskpl) in such wise that these blades actas moldboards and turn over the soil.

In practice the helical or otherblades or y disks are preferably driven at a higher speed than that due to the forward motion ofthe vehicle-and preferably in the opposite direc-` tion to that of the carrying-wheels.

Having now described my invention, what I claim, and desire to` secure by Letters Tat;` l'

ent, is-

1. A device of the class described comprisl ing a disk having a helically-bent'blade projecting from one face thereof and tapered in the direction of itspouter end. ,y

' 2. A device of the class described compris'- ing a disk having a helically-bent blade pro- 65v jecting from one face 'thereof and continu'- ously tapered in the direction of its outer end.;A

3.' A device of the class described comprisl ing a centralsupporting-diskhaving a bevl ing a supporting-disk having a beveled cutting edge, said disk having a blade projecting L l 15,"1 a

therefrom, said blade being bent vto forma heli-x of gradually-decreasing radius. 'Y

4. A device of the class described compris-"v,"` v

5. A device of 'the class described comprisl ing a supporting-disk having a beveled cutting edge, said disk having la tapered blade projecting therefrom, said blade-being bent to form a helix of gradually-decreasin g radins. c

In witness whereof Ihave hereunto set my hand in presence .of two witnesses.

Witnesses: l WALLACE FAIRWEATHER,

vJ No. ARMSTRONG, Jr.

TJoHN .scorn y 

